6745684987 has 2 divisors, whose sum is σ = 6745684988. Its totient is φ = 6745684986.

The previous prime is 6745684963. The next prime is 6745684991. The reversal of 6745684987 is 7894865476.

6745684987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6745684987 - 2¹¹ = 6745682939 is a prime.

It is not a weakly prime, because it can be changed into another prime (6745684997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3372842493 + 3372842494.

It is an arithmetic number, because the mean of its divisors is an integer number (3372842494).

Almost surely, 2^6745684987 is an apocalyptic number.

6745684987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6745684987 is an equidigital number, since it uses as much as digits as its factorization.

6745684987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 64.

The square root of 6745684987 is about 82132.1190947853. The cubic root of 6745684987 is about 1889.4787796879.

The spelling of 6745684987 in words is "six billion, seven hundred forty-five million, six hundred eighty-four thousand, nine hundred eighty-seven".